Self-consistent perturbation treatment of electron correlation effects in transition metals

Abstract

Electron correlation effects in transition metals with model rectangular and semi-elliptic local density of states are studied within the Hubbard model by the self-consistent second-order perturbation theory in U/W (where U is the Coulomb integral and W the bandwidth). It is shown that a satellite structure on the one-particle spectrum predicted by the nonself-consistent second-order perturbation theory disappears when the problem is treated in a self-consistent way.